"never have the details worked out"--Actually, the French revolutionaries who swore the tennis court oath had a detailed plans for replacing the ancien regime. Read Abbe Sieyes' What is the Third Estate.

Lenin had detailed plans for the Bolshevik regime and wrote them in What Is To Be Done?

Hitler had detailed plans....and carried them out as written in Mein Kampf.

Radical Republicans had detailed plans of how to destroy the expansionist Confederate slave power. That's why we have the 13th, 14th and 15th amendments.

Poland's Solidarnosc had detailed plans of how to replace the Communist regime.

The anarcho-syndicalists who briefly instituted a revolution of worker self-management and bottom-up collectivized agriculture during the first year of the Spanish Civil War had very detailed plans of what they wanted. I interviewed many in 1976 and 1980-81 and wrote my undergraduate thesis about it.

https://en.wikipedia.org/wiki/Spanish_Revolution_of_1936

So, demolition for demolition's sake isn't good enough.